A method for improving the hydrophilicity of the cocoon layer by steaming dry cocoons at low temperature

Abstract

The invention belongs to the technical field of pretreatment of dry cocoons by touch steaming, and in particular relates to a method for improving the hydrophilicity of cocoon layers by dry cocoons by touch steaming at low temperature. Soak for 40-60 minutes under the condition of 4-6°C. After the completion, store it in the dark at a temperature of 4-6°C for 1-2 hours. In the steam touch steamer, set the touch-steaming temperature to 80°C and keep it for 5-10 minutes Finally, adjust the contact steaming temperature to 50°C and keep it for 30‑40 minutes. Compared with the prior art, the present invention has the following advantages: in the present invention, the silkworm cocoon can be properly treated at a relatively low temperature of 50-80°C to change the moisture resistance of the cocoon layer by treating it with a finishing solution before the steaming treatment. The effect of the finishing agent helps the cocoon silk to achieve contact steaming and moisture absorption between the cocoon layers under short-term and low-temperature conditions, thereby improving its infiltration and penetration effect.

Description

technical field [0001] The invention belongs to the technical field of pretreatment of dry cocoons by touch steaming, and in particular relates to a method for improving the hydrophilicity of cocoon layers by dry cocoon touch steaming at low temperature. Background technique [0002] The pretreatment of touch steaming in silk reeling refers to the use of saturated steam to carry out moist heat infiltration pretreatment on dry cocoons before cocoon cooking. Since the 1980s, domestic scholars have conducted a lot of research on the pre-treatment process of steaming from the aspects of technological conditions, mechanism of action, and influence on the performance of sericin and the quality of raw silk. Studies, for example, have verified that sericin undergoes denaturation during the pre-treatment process of contact steaming, resulting in densification of the aggregated structure, and hydrolysis occurs, resulting in a decrease in molecular weight and a change in the solubility...

AI Technical Summary

Problems solved by technology

[0002] The pretreatment of touch steaming in silk reeling refers to the use of saturated steam to carry out moist heat infiltration pretreatment on dry cocoons before cocoon cooking. Since the 1980s, domestic scholars have conducted a lot of research on the pre-treatment process of steaming from the aspects of technological conditions, mechanism of action, and influence on the performance of sericin and the quality of raw silk. Studies, for example, have verified that sericin undergoes denaturation during the pre-treatment process of contact steaming, resulting in densification of the aggregated structure, and hydrolysis occurs, resulting in a decrease in molecular weight and a change in the solubility of sericin; Influenced by consumption and other aspects, it is clear that the vacuum dynamic touch steaming technology can promote the quality of raw silkworm cocoons in silk-making enterprises; through the change of the contact angle value between the surface of the cocoon layer and the droplet after the touch steaming pretreatment, the infiltration of the cocoon layer can be improved Effect, when the contact steaming temperature was increased to 105°C and the contact steaming time was extended to 60 minutes, the change of the contact angle value reflected that the wettability and hydrophilicity of the cocoon layer had been significantly improved after the contact steaming pretreatment, but the contact steaming If the temperature is too high, the performance of silkworm cocoons will be affected, and if the contact steaming time is short, uneven contact steaming and uneven moisture absorption will occur. Therefore, how to improve the wettability and hydrophilicity of the cocoon layer under low temperature conditions needs further research